CN214196746U - Magnetic suspension centrifugal compressor fault testing device - Google Patents
Magnetic suspension centrifugal compressor fault testing device Download PDFInfo
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- CN214196746U CN214196746U CN202022903310.8U CN202022903310U CN214196746U CN 214196746 U CN214196746 U CN 214196746U CN 202022903310 U CN202022903310 U CN 202022903310U CN 214196746 U CN214196746 U CN 214196746U
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Abstract
The utility model provides a magnetic suspension centrifugal compressor fault testing device, which comprises a frequency converter and a control module; the control device comprises a control module, a frequency converter, a bearing controller, a signal input end, a signal output end and a power end, wherein the power end of the control module is used for being connected with a first power supply, the first control end of the control module is used for being connected with the bearing controller of the tested compressor, the second control end of the control module is connected with the signal input end of the frequency converter, the signal output end of the frequency converter is used for being connected with the tested compressor, and the power end of the frequency converter is used for being connected with a second power supply. The motor work through controlling compressor and compressor respectively realizes detecting before the compressor reaches the standard grade, effectively realizes the automatic short-term test of compressor monomer empty load and detects, improves the fault detection rate for the reliability of compressor obtains promoting.
Description
Technical Field
The utility model relates to a magnetic suspension centrifugal refrigeration compressor tests technical field, in particular to magnetic suspension centrifugal compressor fault testing arrangement.
Background
The magnetic suspension centrifugal refrigeration compressor has been put into practical application in large scale from the initial research to the present over twenty years, and the magnetic suspension centrifugal refrigeration compressor has the characteristics of high efficiency, low maintenance cost, low noise and light weight, so that the demand of the magnetic suspension centrifugal refrigeration compressor in the industry is increasingly increased and even the phenomenon of short supply and demand occurs. Because the internal bearings of the magnetic suspension centrifugal refrigeration compressor are not in mechanical contact, the requirements on the matching precision and stability of the bearings are high, and the bearings are easy to damage in the processes of transportation and long-distance transportation, so that the stability of the magnetic suspension centrifugal refrigeration compressor is influenced. At present, the overall performance test bed of the magnetic suspension centrifuge is mostly adopted for testing the detection mode in the industry, namely, the overall performance test is carried out after the compressor monomer is assembled to the overall machine, and the performance and the reliability of the unit are monitored through long-time operation. The market demand to centrifuge set is growing day by day, and traditional performance test bench test has can't satisfy the volume demand, becomes the bottleneck of production process, and in addition, this detection mode has following problem:
1. the faults of the single compressor cannot be detected in time, the faults can only be detected through a whole machine testing process, and once the faults are abnormal, the compressor needs to be replaced for processing, so that a large amount of labor and working hours are consumed for reworking;
2. the online fault rate of the compressor is high, no effective fault diagnosis method exists before online, whether the appearance is abnormal or not can be identified only by manual detection, and the precision and the stability of the internal bearing cannot be identified and judged.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is necessary to provide a magnetic levitation centrifugal compressor fault testing device for solving the above technical problems.
A magnetic levitation centrifugal compressor fault testing apparatus, comprising: the frequency converter and the control module;
the control device comprises a control module, a frequency converter, a bearing controller, a signal input end, a signal output end and a power end, wherein the power end of the control module is used for being connected with a first power supply, the first control end of the control module is used for being connected with the bearing controller of the tested compressor, the.
In one embodiment, the control module includes a first control module and a second control module;
the power supply end of the first control module is used for being connected with the first power supply, the control end of the first control module is used for being connected with a bearing controller of the tested compressor, the power supply end of the second control module is used for being connected with the first power supply, the control end of the second control module is connected with the signal input end of the frequency converter, the signal output end of the frequency converter is used for being connected with the tested compressor, and the power supply end of the frequency converter is used for being connected with the second power supply.
In one embodiment, the first control module includes a first control screen.
In one embodiment, the second control module includes a second control screen.
In one embodiment, the first control module is used for controlling the bearing controller of the load compressor to work so that the bearing of the load compressor is separated from the bearing seat;
the second control module is used for controlling the tested compressor to work through the frequency converter and detecting whether the current working frequency of the tested compressor is consistent with a preset frequency.
In one embodiment, the second control module is configured to detect whether the working frequency of the tested compressor reaches a first preset frequency; when the working frequency of the tested compressor is detected to reach the first preset frequency, the working frequency of the tested compressor is controlled to be increased through the frequency converter; after the working frequency of the tested compressor is increased, whether the working frequency of the tested compressor reaches a second preset frequency is detected, wherein the second preset frequency is larger than the first preset frequency.
Above-mentioned magnetic suspension centrifugal compressor fault testing device through the motor work of controlling compressor and compressor respectively, realizes detecting before the line on the compressor, effectively realizes the automatic short-term test of compressor monomer empty load and detects, improves the fault detectable rate for the reliability of compressor obtains promoting.
Drawings
FIG. 1 is a block diagram of the logical connections of a magnetic levitation centrifugal compressor fault testing apparatus in one embodiment;
FIG. 2 is a schematic flow diagram of a magnetic levitation centrifugal compressor fault testing method in one embodiment;
FIG. 3 is a flow diagram illustrating a method for fault testing of a magnetically levitated centrifugal compressor in one embodiment;
fig. 4 is a system diagram of an implementation of the magnetic levitation centrifugal compressor fault testing apparatus in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Example one
In this embodiment, as shown in fig. 1, a magnetic levitation centrifugal compressor fault testing apparatus is provided, which includes: a frequency converter 200 and a control module 100; the power supply end of the control module 100 is used for connecting a first power supply, the first control end of the control module 100 is used for connecting a bearing controller of a tested compressor, the second control end of the control module 100 is connected with the signal input end of the frequency converter 200, the signal output end of the frequency converter 200 is used for connecting the tested compressor, and the power supply end of the frequency converter 200 is used for connecting a second power supply.
Specifically, the frequency converter 200 is used for controlling the rotation speed of the motor of the detected compressor, and specifically, the frequency converter 200 achieves the purpose of controlling the rotation speed of the motor of the detected compressor by changing the frequency and the period of power supply of the alternating current of the motor of the detected compressor. The control module 100 controls the rotation speed of the motor of the tested compressor by controlling the power supply frequency of the frequency converter 200.
The bearing controller of the tested compressor is used for controlling the movement of the bearing of the tested compressor, particularly, the bearing controller is installed inside the compressor, main components of the bearing controller are a main board, and the bearing controller is mainly used for signal conversion, namely, communication is established between the frequency converter 200 and the bearing of the compressor motor, and the effective execution instruction of the bearing of the compressor is guaranteed.
Specifically, the bearing controller generates a control current after receiving the first signal of the control module 100, so that the bearing generates a corresponding electromagnetic force, and the bearing is suspended under the action of the electromagnetic force, so that the rotor of the motor is suspended. It should be understood that, the rotor of the motor falls on the bearing seat by gravity in the shutdown state, and the motor rotor can only float to work normally, so that the bearing generates stable magnetic force to suspend the motor bearing (i.e. the motor rotor) without contacting with surrounding parts, thereby enabling the motor rotor to rotate and enabling the motor to work.
The test process is as follows: the control module 100 controls the bearing suspension of the motor of the tested compressor through the bearing controller of the tested compressor, then controls the motor to start through the frequency converter 200, and detects the tested compressor in the running process of the tested compressor, so that the detection of the tested compressor is realized.
In the above embodiment, through the motor work of controlling compressor and compressor respectively, realize going on the production line to the compressor and detect before, effectively realize the automatic short-term test of compressor monomer and detect fast, improve the fault detection rate for the reliability of compressor obtains promoting.
To make control more accurate, in one embodiment, as shown in FIG. 1, the control module 100 includes a first control module 110 and a second control module 120; the power supply end of the first control module 110 is configured to be connected to the first power supply, the control end of the first control module 110 is configured to be connected to the bearing controller of the tested compressor, the power supply end of the second control module 120 is configured to be connected to the first power supply, the control end of the second control module 120 is connected to the signal input end of the frequency converter 200, the signal output end of the frequency converter 200 is configured to be connected to the tested compressor, and the power supply end of the frequency converter 200 is configured to be connected to the second power supply.
In this embodiment, the control module 100 is divided into two independent modules, one is the first control module 110, and the other is the second control module 120, so as to control the bearing controller of the tested compressor and control the operation of the motor of the tested compressor through the frequency converter 200, respectively, and detect the tested compressor during the operation of the tested compressor.
Referring to fig. 1 and fig. 2, in an embodiment, the first control module includes a first control screen. In one embodiment, the first control screen is a touch screen, and in one embodiment, the second control module includes a second control screen. In one embodiment, the second control screen is a touch screen. In the above embodiment, the bearing controller of the pressure measuring compressor and the work of the motor of the pressure measuring compressor are controlled through the frequency converter by the first control screen and the second control screen respectively, so that the control is more convenient, and the detection result can be fed back and displayed on the control screen, so that the detection is more efficient and convenient.
In one embodiment, the first control module is used for controlling the bearing controller of the load compressor to work so that the bearing of the load compressor is separated from the bearing seat; the second control module is used for controlling the tested compressor to work through the frequency converter and detecting whether the current working frequency of the tested compressor is consistent with a preset frequency.
In this embodiment, first control module passes through bearing controller control bearing and breaks away from the bearing frame for the motor rotor by the pressure measurement compressor suspends, and afterwards, second control module wants the motor input current by the pressure measurement compressor through the converter, makes the motor by the pressure measurement compressor work according to the frequency that the converter set for, and afterwards, second control module detects whether current operating frequency by the pressure measurement compressor is unanimous with preset frequency, thereby detects whether steady operation by the pressure measurement compressor.
In one embodiment, the second control module is configured to detect whether the working frequency of the tested compressor reaches a first preset frequency; when the working frequency of the tested compressor is detected to reach the first preset frequency, the working frequency of the tested compressor is controlled to be increased through the frequency converter; after the working frequency of the tested compressor is increased, whether the working frequency of the tested compressor reaches a second preset frequency is detected, wherein the second preset frequency is larger than the first preset frequency.
Specifically, the operating frequency of the load cell compressor is a frequency of operation of a motor of the load cell compressor. In this embodiment, the second control module controls the tested compressor to start first through the frequency converter and work at a lower frequency, detects the real-time working frequency of the tested compressor at a first preset time after the tested compressor starts, detects whether the real-time working frequency of the tested compressor reaches a first preset frequency, and controls the working frequency of the tested compressor to increase through the frequency converter when the real-time working frequency of the tested compressor reaches the first preset frequency, so that the working frequency of the tested compressor increases. And detecting whether the real-time working frequency of the tested compressor reaches the second preset frequency or not at the second preset time after controlling the working frequency of the tested compressor to be improved, thereby realizing the detection of the tested compressor. It should be understood that, in this embodiment, a lower frequency is set first, so that the tested compressor works at the lower frequency in the initial stage of starting, which is to detect whether the compressor unit can be started normally, ensure that the compressor unit can operate normally, and avoid bearing abrasion caused by abnormal tested compressor failing to start normally at a high frequency; after the tested compressor stably operates for a period of time, the higher frequency is set to detect the reliability of the compressor operating at the high frequency, so that the reliability of the tested compressor is detected.
In one embodiment, the second control module is configured to detect whether the working frequency of the measured compressor reaches a first preset frequency; when the working frequency of the tested compressor is detected to reach the first preset frequency, the working frequency of the tested compressor is controlled to be increased through the frequency converter; after the working frequency of the tested compressor is increased, detecting whether the working frequency of the tested compressor reaches a second preset frequency, and acquiring test parameters of the tested compressor when the working frequency of the tested compressor reaches the second preset frequency; and detecting that the test parameters are matched with preset test parameters, and outputting qualified judgment information according to the detection results of the test parameters and the preset test parameters.
In this embodiment, when the operating frequency of the measured compressor reaches the second preset frequency, the test parameters of the measured compressor are collected by the sensor, where the test parameters include the precision and the rigidity of the bearing of the measured compressor, for example, the test parameters include the offset of the bearing of the measured compressor, the offset of the bearing is detected by the sensor, and whether the collected test parameters are matched with the preset test parameters is detected, so as to determine whether the measured compressor is qualified. In this embodiment, the qualification information includes qualified and unqualified to the qualification information still includes test parameter and measured parameter and the comparison result between them, and qualification information passes through control screen output and shows, makes testing personnel can know fast, conveniently whether qualified by the compressor.
In one embodiment, the magnetic suspension centrifugal compressor fault testing device further comprises a test sensor, the test sensor is connected with the first control module, the test sensor is used for being arranged in the tested compressor during testing and used for detecting the precision and the rigidity of a bearing of the tested compressor, and in one embodiment, the test sensor comprises a vibration sensor and an infrared sensor.
In this embodiment, when the working frequency of the tested compressor reaches the second preset frequency, the first control module measures the precision and the rigidity of the bearing of the tested compressor through the test sensor, so as to detect whether the tested compressor is qualified. For example, whether the vibration amplitude of the bearing of the tested compressor is greater than a preset amplitude is detected through the vibration sensor, when the vibration amplitude of the bearing of the tested compressor is greater than the preset amplitude, first judgment information is output, the first judgment information represents that the tested compressor is unqualified, and when the vibration amplitude of the bearing of the tested compressor is less than or equal to the preset amplitude, second judgment information is output, and the second judgment information represents that the tested compressor is unqualified. For example, whether the offset distance of the bearing of the measured compressor is greater than a preset distance is detected through the infrared sensor, when the offset distance of the bearing of the measured compressor is greater than the preset distance, first judgment information is output, the first judgment information indicates that the measured compressor is unqualified, and when the offset distance of the bearing of the measured compressor is less than or equal to the preset distance, second judgment information is output, and the second judgment information indicates that the measured compressor is unqualified.
Example two
In this embodiment, as shown in fig. 2, a method for testing a fault of a magnetic levitation centrifugal compressor is provided, including:
and step 210, sending a first signal to the tested compressor, and controlling a bearing controller of the tested compressor to work so that a bearing of the tested compressor is separated from a bearing seat.
And step 220, controlling the compressor to be tested to start through a frequency converter.
And step 230, detecting whether the working frequency of the tested compressor reaches a first preset frequency.
And 240, when the working frequency of the tested compressor is detected to reach the first preset frequency, controlling the working frequency of the tested compressor to be increased through the frequency converter.
And 250, detecting whether the working frequency of the tested compressor reaches a second preset frequency, wherein the second preset frequency is greater than the first preset frequency.
And step 260, when the working frequency of the tested compressor is detected to reach the second preset frequency, acquiring and obtaining the test parameters of the tested compressor.
And 270, detecting that the test parameters are matched with preset test parameters, and outputting qualification judgment information according to the detection results of the test parameters and the preset test parameters.
In this embodiment, the method is suitable for testing a single control module.
In this embodiment, first, the bearing is driven by the bearing controller to be separated from the bearing seat, then, the tested compressor is controlled by the frequency converter to operate at a lower frequency, after the tested compressor operates for a period of time, whether the working frequency of the tested compressor reaches a first preset frequency is detected, when the working frequency of the tested compressor reaches the first preset frequency, the working frequency of the tested compressor is controlled by the frequency converter to be increased, after the working frequency of the tested compressor is increased to operate for a period of time, whether the working frequency of the tested compressor reaches a second preset frequency is detected, when the working frequency of the tested compressor reaches the second preset frequency, the test parameter of the tested compressor is acquired by the sensor, and the qualification judgment information is output according to the comparison result of the test parameter and the preset test parameter.
It should be understood that the comparison between the test parameter and the preset test parameter includes detecting whether the test parameter is consistent with the preset test parameter or whether the test parameter is within a preset range of the preset test parameter, indicating that the test parameter is matched with the preset test parameter when the test parameter is consistent with the preset test parameter or the test parameter is within the preset range of the preset test parameter, and indicating that the test parameter is not matched with the preset test parameter when the test parameter is inconsistent with the preset test parameter or the test parameter is not within the preset range of the preset test parameter.
In the embodiment, a lower frequency is set firstly, so that the tested compressor works at the lower frequency in the initial starting stage, and the purpose is to detect whether the compressor unit can be started normally or not, ensure that the compressor unit can run normally, and avoid bearing abrasion caused by the fact that the abnormal tested compressor cannot be started normally at a high frequency; after the tested compressor stably operates for a period of time, the higher frequency is set to detect the reliability of the compressor operating at the high frequency, so that the reliability of the tested compressor is detected. And whether the operation of the tested compressor is stable and reliable is determined by detecting whether the test parameters of the tested compressor are matched with the preset test parameters.
EXAMPLE III
In this embodiment, as shown in fig. 3, a method for testing a fault of a magnetic levitation centrifugal compressor is provided, including:
In this embodiment, the method is suitable for testing two control modules. In this embodiment, the bearing controller of the tested compressor and the operation of the motor of the tested compressor through the frequency converter are respectively controlled by the first control module and the second control module, and the tested compressor is detected in the running process of the tested compressor.
In this embodiment, the first control module includes a first control screen, and the second control module includes a second control screen, so that the detected qualification determination information can be displayed through the first control screen or the second control screen. The test of the detection personnel is more convenient.
In one embodiment, the step of the second control module detecting whether the working frequency of the tested compressor reaches a first preset frequency includes: and the second control module detects whether the working frequency of the tested compressor reaches a first preset frequency at a first preset time after the tested compressor is started.
In this embodiment, start by the pressure measurement compressor to after operating a period, detect the operating frequency by the pressure measurement compressor again, whether the operating frequency that detects by the pressure measurement compressor reaches first preset frequency, like this, can make by the pressure measurement compressor at initial start-up stage, with lower frequency operation to stability, promote the frequency by the pressure measurement compressor afterwards again, make more accurate to the detection by the pressure measurement compressor.
In one embodiment, the step of the second control module detecting whether the working frequency of the tested compressor reaches a second preset frequency includes: the second control module controls the working frequency of the tested compressor to be increased for a second preset time through the frequency converter, and the second control module detects whether the working frequency of the tested compressor reaches a second preset frequency.
In this embodiment, being measured the compressor and promoting the frequency to after operating a period under higher frequency, again to being measured the operating frequency of compressor and detecting, whether the operating frequency that detects by the compressor reaches the second and predetermines the frequency, like this, can make by the compressor with higher frequency operation to stable, make more accurate to being measured the detection of compressor.
Example four
In this embodiment, as shown in fig. 4, an automatic control detection system is developed, communication is established between a control panel of a compressor and compression, and a control panel 1 performs logic control on a compressor to be tested through a self-programming sequence; the control screen of the frequency converter establishes communication with the frequency converter, and the control screen 2 carries out logic control on the frequency converter; the frequency converter is communicated with the compressor, signals are transmitted to a compressor bearing controller so as to control the bearing to operate, and on the other hand, the frequency converter provides power for the compressor.
The compressor bearing and the motor are respectively controlled through the control screens 1 and 2, whether the bearing suspension precision and the running process precision are stable or not is automatically detected under different frequencies, whether the compressor single body is in fault or not can be rapidly diagnosed through the control screens, therefore, the fault compressor is controlled to be on line, the condition that the on-line compressor is qualified is ensured, and the normal production of the post-process is ensured.
The following technical problems to be solved in the present embodiment
1. The failure rate of the online compressor is reduced;
2. the fault automatic detection function is realized, and the problem of timeliness of detecting the bearing precision and rigidity abnormity by the complete machine test is solved;
3. the fault compressor is detected before the on-line operation, the rework caused by the process of testing the whole machine is avoided, and the problem of manpower and working hour waste is solved.
The embodiment provides a method for rapidly detecting and diagnosing faults of a single body of a magnetic suspension centrifugal compressor.
In the automatic control detection system, communication is established between a compressor control screen 1 and compression, and the control screen 1 carries out logic control on a tested compressor in a self-programming sequence; the control screen of the frequency converter establishes communication with the frequency converter, and the control screen 2 carries out logic control on the frequency converter; the frequency converter is communicated with the compressor, signals are transmitted to the compressor bearing controller so as to control the bearing to operate, and on the other hand, the frequency converter provides power supply required by operation for the compressor.
The starting process comprises the following steps: after a frequency converter and a control screen are electrified, firstly, a compressor bearing is floated by operating the control screen 1, after the control screen displays that the bearing is stable, the running frequency of a motor is controlled by the control screen 2, firstly, an initial lower frequency is set by the control screen 2 to start the compressor to run, when the real-time frequency displayed by the control screen 2 is consistent with the set frequency, the higher frequency is reset by the control screen 2 to accelerate the rotating speed of the compressor, when the real-time frequency is consistent with the set frequency again, the precision and the rigidity of the compressor bearing are inspected by the control screen 1, and whether the compressor bearing is qualified or not is judged by automatic diagnosis. The method comprises the steps of firstly setting a lower frequency and then setting a higher frequency, wherein the lower frequency is set firstly to detect whether a single compressor can be started normally or not and ensure that the single compressor can be operated normally, so that bearing abrasion caused by abnormal compressor incapable of being started normally under high frequency is avoided, and the higher frequency is set later to detect the reliability of the compressor in operation under high frequency. And when the compressor runs stably for 3min, if the fault lamp of the control panel 1 does not report the fault, judging that the no-load test of the compressor is qualified.
The shutdown process: the compressor motor is stopped by the control screen 2, and after the rotor stops running, the compressor bearing is stopped and floated by the control screen 1 until the no-load test of the compressor is completed.
Has the advantages that:
1. the detection and diagnosis are carried out before the compressor is on line, and the abnormality is detected in time, so that the qualified rate of the on-line compressor is ensured to be 100 percent, and the defective products are prevented from flowing into the repair caused by the test of the whole machine test procedure;
2. risks are identified and controlled in advance, so that the production process of the whole machine is ensured to be carried out smoothly, products are ensured to be produced according to a normal production period, and a large amount of labor and working hours consumed by repair are saved;
3. the automatic and rapid detection of the compressor monomer no-load test is realized, the fault detection rate is improved, and the reliability is improved.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (6)
1. A magnetic levitation centrifugal compressor fault testing apparatus, comprising: the frequency converter and the control module;
the control device comprises a control module, a frequency converter, a bearing controller, a signal input end, a signal output end and a power end, wherein the power end of the control module is used for being connected with a first power supply, the first control end of the control module is used for being connected with the bearing controller of the tested compressor, the second control end of the control module is connected with the signal input end of the frequency converter, the signal output end of the frequency converter is used for being connected with the tested compressor, and the power end of the frequency converter is used for being connected with a second power supply.
2. The magnetically levitated centrifugal compressor fault testing apparatus of claim 1, wherein the control module includes a first control module and a second control module;
the power supply end of the first control module is used for being connected with the first power supply, the control end of the first control module is used for being connected with a bearing controller of the tested compressor, the power supply end of the second control module is used for being connected with the first power supply, the control end of the second control module is connected with the signal input end of the frequency converter, the signal output end of the frequency converter is used for being connected with the tested compressor, and the power supply end of the frequency converter is used for being connected with the second power supply.
3. The magnetically levitated centrifugal compressor fault testing device of claim 2, wherein the first control module includes a first control screen.
4. The magnetically levitated centrifugal compressor fault testing apparatus of claim 2, wherein the second control module includes a second control screen.
5. The magnetic levitation centrifugal compressor fault testing device of claim 2, wherein the first control module is configured to control operation of a bearing controller of the load compressor to disengage a bearing of the load compressor from a bearing seat;
the second control module is used for controlling the tested compressor to work through the frequency converter and detecting whether the current working frequency of the tested compressor is consistent with a preset frequency.
6. The magnetic levitation centrifugal compressor fault testing device according to claim 5, wherein the second control module is configured to detect whether an operating frequency of the compressor under test reaches a first preset frequency; when the working frequency of the tested compressor is detected to reach the first preset frequency, the working frequency of the tested compressor is controlled to be increased through the frequency converter; after the working frequency of the tested compressor is increased, whether the working frequency of the tested compressor reaches a second preset frequency is detected, wherein the second preset frequency is larger than the first preset frequency.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113638903A (en) * | 2021-10-13 | 2021-11-12 | 亿昇(天津)科技有限公司 | Magnetic suspension centrifugal oxygen compressor control system and control method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113638903A (en) * | 2021-10-13 | 2021-11-12 | 亿昇(天津)科技有限公司 | Magnetic suspension centrifugal oxygen compressor control system and control method thereof |
| CN113638903B (en) * | 2021-10-13 | 2022-02-11 | 亿昇(天津)科技有限公司 | Magnetic suspension centrifugal oxygen compressor control system and control method thereof |
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